Re: Sims only use dishwasher to clean dishes
Yeah, they will do that all the time. So I just don't use dishwashers. Another thing is that the Bust the Dust pack has an aspiration milestone to wash dishes 3 times so I got rid of the dishwasher so my sims could complete that milestone. If you leave the dishwasher in place, the sims will almost never wash dishes in a sink unless the dishwasher is running so it makes it a whole lot easier to complete the milestone.
But the other thing that does happen without a dishwasher, is sims will still traipse all over the house to wash dishes. They tend to ignore the countertop sinks most of the time and go to the bathroom pedestal sinks. Even then, it might not be the closest one. I have some lots where I have had to change the sinks to a different one to stop that so they wash dishes where I want them to. Evidently, some sinks appear more attractive to the sims than others. It's hit and miss a lot of times. So, to get the sims doing what you want, you have to experiment for which sink works for how you want your sims to wash dishes.
Hope this helps.